Mailchimp's business is specifically to get around spam filters. An ICO only email company would be almost useless without being able to leverage all the 'legitimate' traffic to lower their profile.
> An ICO only email company would be almost useless without being able to leverage all the 'legitimate' traffic to lower their profile.
Right, but it's feasible for any other company to build a product that delivers e-mail as effective as Mailchimp to the exact same audience. There isn't an implicit or explicit audience limitation in this case.
